Add badges to TransactionCommentView

Summary: Fixes T10698. This shows badges under the comment preview if the application uses TransactionCommentView. I suspect not everything does, but will pick the fix up for free when modernized.

Test Plan: Test commenting on a task with and without a user that has a badge. See badge preview.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T10698

Differential Revision: https://secure.phabricator.com/D17480